X1 - Tempo / Groove Loops / audio Snap

 
No Metronome used. Project tempo: 120
recored several different classical guitar parts on one track.
 
The first recording, I'm trying to make a loop out of part of it, but the only good part is not an even measure.
if double clicked and brought into loop construction, the audio becomes stretched (slower sounding)
 
if I then change the tempo to 140, it's at the correct tempo, but there is noticible artifacting.
 
In this situation, is it better to use audio snap?